Sheet metal roofing



Nov. 23. 1937. v. T. RENNER SHEET METAL ROOFING Filed Feb. 25. 1936 Patented Nov. 23, 1937 PATENT OFFICE SHEET IHE'I'AL BOQFING Verdon Thomas Bonner, Parkersburg, W. Va., assignor to The Parkersburg Iron and Steel Company, Parkersburg, W. Va., a corporation of West Virginia Application February 25, 1936, Serial No. 65,591 2 Claims. (oi. res-18 This invention relates to sheet metal roofing. and more particularly to lapped joints for such roofing wherein longitudinal crimps are provided along opposite edges of roofing sheets in position to overlap in nested relation.

A general object of the invention is to provide an improved lapped joint for roofing sheets.

More particularly, objects of the invention are to provide a lapped roofing joint having improved water-proofing characteristics in which means are provided for preventing or retarding the seepage of water between the lapped sheets and for draining such water as may get between them, and which is rigidly able to withstand nailing'or other crushing forces, and has a number of alining surfaces on the lapped members so positioned as to assure easy and accurate assembly.

Further objects of the invention are to provide a lapped joint having advantages such as those described above, in which the special bends or corrugations providing the waterproofing, rigidifying and alining features are few in number and may be confined to one crimped member, and in which the smaller and more abrupt bends are formed adjacent the terminal edge of such member where the material is easier to handle and where reasonable tolerance can be permitted in the location of such terminal edge without impairing the functions of the joint.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the features of construction, combination of elements and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of the invention will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken m' connection with the accompanying drawing, in which:

Fig. 1 is a fragmentary perspective view showing adjacent roofing sheets embodying features of the present invention; and

' Fig. 2 is a fragmentary transverse vertical sectional view taken through an overlapped joint embodying features of the invention.

to sheet metal roofing having longitudinalcrimps or corrugations adapted to nest in overlapping relation at opposite edges of each sheet. In the preferred form of the present construction, an

improved configuration is given to one lapped The present invention is generally applicable crimped member of each sheet and theremaining crimps of such sheet may preferably be of simple inverted V construction, such as that which. is

conventionally used in 3-V or 5V crimped there is shown in Fig. 1 a series of sheet metalroofing members Ill, each of which terminates at one edge in an overlapping member and at the opposite edge in a lapped member which is adapted to nest within the overlapping member of an adjacent sheet to form a lapped joint. overlapping member comprises an outer inclined leg H which may, if desired, terminate in a short horizontal flange H which affords an added support or rest for the leg M. This flange H is not strictly essential, however, and may be omitted as shown in Fig. 2. The overlapping member has an inner oppositely inclined leg 12 joined to leg H by a crown portion 13 which, as illustrated, is desirably of upwardly convex curved shape, the entire overlapping member being of simple inverted V formation having smooth sides or legs.

The lapped member comprises an upwardly leg I l at at least its upper and lower portions. The intermediate portion of leg I4 is dished inwardly as at l5 to provide a space which is sufficiently wide to disrupt capillary elevation between the lapped legs. This space also provides an air vent which tends to prevent syphoning of rain water between the sheets. The leg I 4 merges into a crown portion l6 which is preferably of concentric curvature with the crownportion I 3 and in full surface contact therewith, al-

25 sloping leg it which extends from the main body of its sheet Hi and isin full surface contact with nailing or other crushing forces. At its lower end,

the upright leg I! merges with an. inverted V- shaped foot comprising an inner side l8 which is bent upwardly from the leg I! and forms therewith a drainage trough which is effective to discharge any water which may have seeped or been forced by wind beyond the air space at IS. The

surface contact with such leg l2. The terminal edge of the side preferably rests against the roof sheathing, or at least extends sufficiently to ward the latter to prevent any material flattening of the trough l'l--i8.

The several special bends provided in the lapped member are of simple and comparativelygently curved formation and are few in number so that the specially prepared crimping may readily be manufactured by means of simple and economical dies. Further, the shorter and more abrupt bends at the sides 18 and 20 of the small foot adjacent to the lower end of leg i1, are comparatively easy tomake because they are located near the terminal edge of the sheet material, where it is easier .to bend and handle. It will also be seen that reasonable tolerance in the crimping operations can be-permitted without giving undue care tothe ultimate position of the extreme edge of side 20, since either the latter orthe trough at I9, and usually both, will afford a solid footing for the upright supporting leg IT. The downwardly extending side 20 is in extended surface contact with leg l2, and, in conjunction with the mating surfaces between legs II and It, and the crowns l3 and it if the'latter are in surface contact, serves properly to alinethe lapped members. As is best shown in Fig. 2, it will be seen that strains due to nailing or other downward crushing forces are resisted by the upright leg l1, and that any tendency of the latter to spread outwardly is counteracted by the surface contact between the foot at 20- and the overlapping leg H. The lapped joint also effectively prevents waterfrom reaching the roof sheathing, because of 'the channel at i! and the drainage trough at 9.

It will belseen that there has been provided a construction which is well suited to fulfill its intended functions. Since certain changes may be made in the above construction and diflerent embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

at one edge with an overlapping inverted V- 5 Y shaped member having a convex crown portion and adjoining straight flat sides, and an unsymmetrical lapped member on an edge of the adjacent sheet; said lapped member consisting of a crown portion for nesting in and supporting said 10 convex crown portion and adjoining major and minor legs, said majorleg sloping upwardly from the sheet and having a. preponderance of its surface in direct contact with the overlapping terminal leg, and a minor portion of said surface out 1 of contact with said leg, and a base margin in surface contact with the terminal margin of said terminal leg, said minor leg sloping downwardly and provided with a terminal formation comprising a relatively small inverted U-shaped foot 20 connected to said minor leg by a U-shaped drainage trough, the outer side of-said foot being of plane formation and providing a terminal surface in direct contact with the base portion of the remaining leg of said overlapping member.

2. A lapped joint for sheet metal roofing, comprising adjacent sheets, one of which is provided at one edge with an overlapping inverted V- shaped member having a convex crown portion and adjoining straight flat sides, and a cooperating unsymmetrical lapped member on an edge of the adjacent sheet; said lapped member consisting 'of a crown portion for nesting in and supporting said convex crown portion and adjoining major and minor legs, said major leg sloping upwardly from the sheet and having a preponderance of its surface in direct contact with the overlapping terminal leg and a minor portion that is dished inwardly out of contact with said overlapping terminal leg, and a base margin in surface contact with the terminal margin of said terminal leg, said minor leg sloping downwardly and provided with a terminal formation comprising a relatively small inverted U- shaped foot connected to said minor leg by a U- shaped drainage trough, the outer side of said foot being of plane formation and provided with a-terminal surface in aligning surface contact with the base portion of the remaining leg'of I said overlapping member.

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